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複合板層疊之裂縫穩定探討
Authors
ZHENG-XIONG ZHANG
張正雄
Publication date
6 June 2014
Publisher
應用數學研究所
Abstract
本文旨在應用由Chu 所述之壓力區,考慮由兩種不同材料對稱疊合而成之構材,當其 內含一裂縫,在改變材料性質,及各種不同之受力型態與幾何形狀的情況下,探討該 壓力區對此構材於裂縫快速延伸時之穩定性影響。 本文採用有能力描述裂縫尖端奇異特性之有限元素APES 程式,算出皮之位移場,爾 後再經最小平方慹力平滑法,求得更準確之元素內各處應力分佈。 分析結果顯示,構材之受力型態改變,其穩定性之變化最,次之為裂縫長度的改變, 裂縫愈短,穩定性愈差,即構材愈顯脆性性質,此性質與Brace 及Perl 的分析吻合 ,資證本文對壓力區論述的可靠性,但欲期更成熟,有待實驗論證
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Last time updated on 16/06/2016